Work

Structure-property-performance parametric investigation of the effect of platinum loading on RH-sensitivity of proton exchange membrane fuel cells

Year: 2025

Type: article

Abstract: Relative humidity and platinum content are crucial factors that affect proton and oxygen transport behavior in the heterogeneous architecture of the fuel cell cathode. The need exists to understand the concurrent effects of these factors on fuel cell performance, considering recent commercialization efforts aimed at reducing fuel cell system costs. This body of work presents a systematic account of the effect of cathode platinum loading and operating relative humidity on a matrix of structure, property, and performance parameters. Results demonstrate that RH-sensitivity is governed by the parameter(s) of the polarization domain the system is operated in, and in turn, the inherent material properties driving the said parameters. Results further suggest that MEAs with lower Pt loadings are less responsive to fluctuation in humidification, compared to high platinum loaded counterparts, and in turn could offer a broader operating window or support the usage of less complex auxiliary humidification systems.

Source: Journal of Power Sources

DOI: 10.1016/j.jpowsour.2025.238816

Authors: Francois van Schalkwyk, Pieter Levecque, Darija Susac

Institution: University of Cape Town

Language: English

Topic: Fuel Cells and Related Materials

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $4,230